[net.math] Solution to the Know/Don't Know Game

mpoppers@aecom.UUCP (06/19/84)

	After B's first announcement, the possibilities are reduced to a table
which begins as follows:

		  SUM                   SUM OF SQUARES
		=======                 ==============
		    8                      50
		    9                      65
		   10                      50
		   11                      65,85
		   13                      85,125,145
		   14                      130,170
		   15                      125
		   16                      130,200
		   17                      145,185,205
		  ....                     ....


	The only appearances of 50, 65, 85, 125, and 145 as a sum of squares
in this table are already displayed. A's first announcement rules out the sums
8, 9, 10, and 15. B's second announcement rules out the 65 from the row of sum
11 and the 125 from the row of sum 13. A's second announcement rules out the
sum 11. B's third announcement rules out the 85 from the row of sum 13. A's
third  rules out the sum 13. B's fourth announcement shows one
possible answer to be that the sum is 17 and the sum of squares 145, giving
8 and 9 as the numbers.

		     PART  II  COMING SOON!!!

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